Composite boom for steam-shovels and the like.



' No. 812,264; PATENTED FEB. 13, 1906.

- wf FBRRIS. comrosnz BOOM FOR STEAM SHOVBLS AND THE LIKE.

APPLICATION FILED JUNE 10, 1905.

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- No. 812,264. PATENTED FEB. 13, 1906.

, W. FERRIS. COMPOSITE BOOMIOR STEAM SHOVBLS AND THE LIKE.

APPLICATION FILED JUNE 10, 1905.

2 snnms smm 2.

.O (D C) iio others skilled in th art to I5 plying the edge strip or hinder zo edge 'stri )YALTER FERRlS, OF SOUTH Mllill'i it'h'lili. 'ISCONSIN, ASSIGNOR TO THE .BUCYRUS (.UBHAXY, ()F v RA'IION ()F 'ISCONSIN.

- COMPOSITE BOOM FOR'STEAM I No.s12,264. Specification To'ali whom it may rvmeern I Be it known that l. ll'sixraii Fannisaeiti- Zen ol'the United States, residiiigat- South Milwaukee, county of Milwaukee, \Viseonsin,

5 have invented certain new and useful linprovenients iii (oniposite Booms for Stem hovels and the hike; and I do herehydeelare the following to he a full. clear. and exact description of the-iiivent-ion. such as will enable whieh it appei't-ains to. make and use the same.

My iiivention relates to composite hooins Torsteai'n shovels, excavators. and the like. andv has [or itsohjeet to provide means for zipaeenrately to the. wood tiller and for compensating the sh m go of the wood and the expansion of tliediiietal, toget her with a hooni-stii connec- "tio'i'i at the end of the boom attached to the p and engaging the side plates thereh i' serving to distl'ihute the bending strains to all pai'tsml' the composite structure and also to'inaterially strengthen the hoom at the point of greatest st-rain\'i'/.., just below the 5 point-shinive.

'l ofthis end the invention eoni irisesahooni having a core or filling of wow with metal side plates holted thereto, an edge strip or hii'i'der provided with means for drawing t 0 ad'iistin the ends of the hinder toward each other to cause the hinder to elosel v hug the periphery of the wood filling when the parts of the hooin are asseinhled in the first instance to afford and also to draw up the hinder tightly on the filling, when the latter shrinks after the hoom is put in service, and a lug forming the outward attachment. for the boullbgll), which jlug is securely fastened to the edge strip or binder and also to the wood filling at a point just below the hearing of the point-sheave. said lug haviiv a rearv mrdly-extendin; strap an e icient connection with thoedge i strip and also having u )wardly-extending side flanges to engage and support the edges 5 of the side plates.

In the accompanying drawings, Figure 1 is a plan View of a steam-shovel hoom einhody in my invention. Fig. 2 is a side elevation thereof. Figs. 3, 4, and 5 are enlarged detail viewsof the lugs for connecting the ends of of Letters Patent. A iimi'nn fiiei June 10,1905. Serial is. 264,663;

' wood tilling -sHovE-i s AND' THE. LIKE.

the edge hinder-plates. enlarged detail views of the gov-connecting lu s i i hooin proper, which consists of two longitultet'erring to the drawings, a indicatesthe- Patentedleb. 13, 1 996. i

Figs. 6, 7, and 8 are dinal truss-like inenihers spaced by the usual-. distance pieces or.,.hloel s 3/, -l of Said-lone.

gitiidiinil nieinhers-eoi iprising an interior fill ing of wood l'eiiil i reed by eonneeted to each other andto the wood fillsteel side plates 1),.

mg h v suitablethrough-bolts; as will he un-f;

(lerstood hv those skilled in the art to which-FL I this invention relates.

Surrounding theerliieor periphery of the within each of the longitudinal members is a steel hinder or edge stripiconsistiiigoflseet oiiiil lmlts. This hindehotedgestrifi, as indicated, is made. in two or more. separate.parts and the adjacent ends of the respective parts are.

steel strips .or plates c,likewise attached to the wood tilting by through-i provided with hracket like lugs d. which are I rigidly secured to the respective -platesee' t-ions hy rivets and to, the wood filling by certain of the through-holts which pass through the lugs. The vertical ears hraekets a are perforated holts e, carrying suitahle nuts, which are turned i|p,s0 as to draw the lugs and the ends of the hinder-plates toward each other and eause the plates to elosely engage the periph erv of the wood tillingjiit the time of assenthliii; the parts of the hoom and also tot-onipensiite for shrinkage of the wood after the hoom is put in' serviee' f By thisineans the difficulties fl(( 'uentlv encountered inhooins of the lugs or, to receive stout,

of this genera type as'lieretofore eonstructed, due to the shrinkagelof the wood aiid in' ahilitv to fit the edge plate to the periphery of i the filling when the' parts are secnred'together h v through-bolts only are obviated, and by properly adjusting the lugs on the ends of the binder-plates toward each other when a plying the hinder-plates to the edges of the tiller and also when the wood of the filler'has shrunken all looseness of fit between the hinder and the other elements of the boom is avoided.

As illustrated, the edge hinder late or strip is provided with two sets of a justable ,45 posed u lugs, one upon the top ed e and the other,

upon the bottom edge, w 'oh connect the two sections of the binderwhieh pass around the respective ends of the boom. Under cerg tain circumstances, however, the binder may be made of pnestrip passing entirel around the boom and adjustablyeonnecte bysuitable. lugs and bolts at its ends, or, if desired,

' the binder may be applied as a series of sec- 10 tions having their ad acent ends connected u g strain is imposed upon theboom, I pro 20 vide a special casting consisting of a strap .like'seetion h, secured to the edge binder c nearthe outer end of the booni,'upon whichstra hke section there is integrally formed a pin-oearin'g i, adapted to receive the pin or 25 pintle'which passes through the e e in the end of the boom-guy; The latera edges of the stra h are provided with upturned flanges which'overlap the edges of the binder c and engage the adjacent edges of the 0 side plates 6, and'in the'body portion of thc strap and the bearing-lug are four or-m'ore re= mforced bolt-holes to receive a corresponding' number of the through-bolts which tie be seen -that the boo'muy-eonnecting lug serves to strengthen an support the edge binder and the side plates, as well as the point sheaveibearing, at,-the point where the bending strain is greatest. It will also be noted 46 that in securing the guy-lug to the edge binder plate and connecting both to the ing by means of the through-bolts the casting forming the lug is anchored in an absolutely secure manner and the strain im 11 the boom at the point of attach .m ent o theguy is distributed to the several elements which go-tomake up the -booi n-to the edge binder-plates, the side plates, ,aa'd the wood filling and the boomadjac'ent the parts of the boom together. It will thus to the point-sheave bearing whereits depth is least is materially strengthened.

the ends of said binden' 2. ,In a composite boom having a wood fillmg, a sectiona metal binder around the edges of said filling, andmeans for adjustably connecting the adjacent ends of the binder-sec tions.

3. Ina composite boom having a wood fill ing, a metal'binder' around the edge of saidfilling, lugs on the ends of said bmder and bolts cooperating with said lugs for adjustably connecting the ends of the binder. 4.- In a composite boom having a wood lilling, sectional metal binding-plates around the edge of said filling, lugson the ends of the latesectio'ns, and bolts cooperating with adacent lugs foradjustably connecting the plates. I

In a comppsite boom having a wood lilling andfmetal' side and edge plates, a boomguy lug Zattached to the under side of the boolinyengaging and supporting the side and edge 'plates.

ing and metal side and edge plates, a boom- 4 guy lug comprising'a' strap riveted to the edge plate below the point-sheave, a pinbearing on "said-strap andllanges along the sides of said strap engaging the edges of the side plates. 1

In testimony whereof I allix my signature in presence of two witnesses.

Witnesses:

,RnxncLY FLETCHER, Halon? B. IIAYDEN.

I Having'thus described my invention, what ,I claim r 1. In aicom'posite boom having a wood filling, a metal binder around the edge of said filling and means for adjustably connecting yvauraa Foams. 

